"The statement that "low interest rates screwed Ireland" seems to be one of those shortcuts. I thought it was Ireland taking advantage of those low interest rates without any thought of the future that screwed them."
I think you're rather anthropomorphising a complex system there. It seems that by 'Ireland' you mean the Irish economy, which you can't credit with consciousness. It's odd to try to blame it. The reaction of the Irish economy to low interest rates was simply exactly how any economy would react.
If by 'Ireland' you mean the Irish government, then I think you'll find that it was fiscally responsible during this period and ran a surplus."
Meanwhile in Spain there was certainly a property speculation bubble, but they built a lot of infrastructure as well. This may well stand them in better stead if and when their economy recovers.